VONA
What is VONA?

VONA stands for Volcano Observatory Notice for Aviation. It issues reports for changes, both increases and decreases, in volcanic activities, providing a description on the nature of the unrest or eruption, potential or current hazards as well as likely outcomes. See the following link (USGS) for further details. The Center for Volcanology and Geological Hazard Mitigation (CVGHM) under the Geological Agency of the Indonesian Ministry of Energy and Mineral Resources produced VONA's reports based on analysis of data from the agency's monitoring networks as well as from direct observations. VONA's alert levels are color-coded to indicate the different types of notifications addressing specific informative needs. The reports are disseminated via email to national and international stakeholders in the aviation sector. Other interested parties can avail of them through email subscription. All notifications are publicly available online.

USGS
 

15th of October 2021, 1 week ago

2021-10-15 23:38:00 UTC Orange

Ibu - 20211015/2338Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 6 days ago

Eruption with volcanic ash cloud at 2323 UTC (0823 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north.

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9th of October 2021, 1 week ago

2021-10-09 09:05:00 UTC Orange

Ibu - 20211009/0905Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 0751 UTC (1651 local). Best estimate of ash-cloud top is around 5520 FT (1725 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast..

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18th of September 2021, 1 month ago

2021-09-18 02:59:00 UTC Orange

Ibu - 20210918/0259Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0235 UTC (1135 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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2021-09-18 01:34:00 UTC Orange

Ibu - 20210918/0134Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0131 UTC (10.31 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

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2021-09-18 00:28:00 UTC Orange

Ibu - 20210918/0028Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0022 UTC (0922 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to West.

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6th of September 2021, 1 month ago

2021-09-06 00:20:00 UTC Orange

Ibu - 20210906/0020Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0016 UTC (0916 local) Best estimate of ash-cloud top is around 5520 FT (1725 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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17th of August 2021, 2 months ago

2021-08-17 23:01:00 UTC Orange

Ibu - 20210817/2301Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 2257 UTC (0757 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.

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9th of July 2021, 3 months ago

2021-07-09 22:19:00 UTC Orange

Ibu - 20210709/2219Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash cloud at 2220 UTC (0720 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

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17th of May 2021, 5 months ago

2021-05-17 01:39:00 UTC Orange

Ibu - 20210517/0139Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash-cloud at 0139 UTC (1039 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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26th of April 2021, 5 months ago

2021-04-26 00:44:00 UTC Orange

Ibu - 20210426/0044Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash-cloud at 0016 UTC (0916 local) Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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22nd of April 2021, 6 months ago

2021-04-22 05:14:00 UTC Orange

Ibu - 20210422/0514Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash-cloud at 0358 UTC (1258 local) Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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20th of April 2021, 6 months ago

2021-04-20 09:26:00 UTC Orange

Ibu - 20210420/0926Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash-cloud at 0919 UTC (1819 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east.

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6th of April 2021, 6 months ago

2021-04-06 09:39:00 UTC Orange

Ibu - 20210406/0939Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash cloud at 0912 UTC (1812 local) Best estimate of ash-cloud top is around 5520 FT (1725 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south..

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31st of March 2021, 6 months ago

2021-03-31 09:54:00 UTC Orange

Ibu - 20210331/0954Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash-cloud at 0924 UTC (1824 local). Best estimate of ash-cloud top is around 5200 FT (1625 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east..

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25th of March 2021, 6 months ago

2021-03-25 09:11:00 UTC Orange

Ibu - 20210325/0911Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash-cloud at 0914 UTC (1814 local) Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.

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VONA Color Code

Volcano is in normal, non-eruptive state, or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.


Volcano is experiencing signs of elevated unrest above known background levels, or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.


Volcano is exhibiting heightened unrest with increased likelihood of eruption with column height below 6000 meter above sea level.


Eruption is forecast to be imminent with significant emission of ash with column height above 6000 meter above sea level.